#3B3372
Closest named color: Dark Slate Blue (#483D8B). oklch(36.5% 0.105 285.8), rgb(59, 51, 114).
Aa
White text reads best on this color (11.03:1).
About this color
#3B3372 is a dark, moderately saturated purple. In OKLCH its lightness is 36%, its chroma 0.105 and its hue 286°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.054 away. White text reads best on it, at 11.03:1.
| Hue family | Purples |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.105) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 1.90:1 |
| White text | 11.03:1 |
Values
| HEX | #3B3372 |
| RGB | rgb(59, 51, 114) |
| HSL | hsl(248, 38%, 32%) |
| OKLCH | oklch(36.5% 0.105 285.8) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #3B3372 | 11.03:1 | AAA | Lc -99.2 | Preferred for body text |
| Black text on #3B3372 | 1.90:1 | Fails | Lc 8.6 | Not readable |
| #3B3372 text on white | 11.03:1 | AAA | Lc 95.3 | Preferred for body text |
| #3B3372 text on black | 1.90:1 | Fails | Lc -7.3 | Not readable |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 900.
-
Step 50
50
#F4F5FC
oklch(97.1% 0.009 279.7)
-
Step 100
100
#E8E8F9
oklch(93.6% 0.023 286)
-
Step 200
200
#D6D6F5
oklch(88.6% 0.042 285.5)
-
Step 300
300
#BBBAF2
oklch(80.9% 0.079 285.3)
-
Step 400
400
#9A94EB
oklch(70.7% 0.126 285.9)
-
Step 500
500
#8377E5
oklch(63.1% 0.161 285.8)
-
Step 600
600
#6E5DD3
oklch(55.6% 0.175 285.8)
-
Step 700
700
#5C4CB7
oklch(49.2% 0.162 285.6)
-
Step 800
800
#4B3F94
oklch(42.7% 0.134 285.7)
-
Step 900
900 (this color)
#3B3372
oklch(36.5% 0.105 285.8)
-
Step 950
950
#242045
oklch(26.9% 0.067 285.9)
#3B3372 with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #143E74 | 0.053 |
| Deuteranopia (no green cones) | #123A71 | 0.052 |
| Tritanopia (no blue cones) | #29414D | 0.089 |
| Achromatopsia (no color) | #3C3C3C | 0.105 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3B3372
#3B3372
oklch(36.5% 0.105 285.8)
- #444000
#444000
oklch(36.4% 0.077 105.6)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #3B3372, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.054
- Twilight Blue #0A437A ΔE 0.063
- Marine Blue #01386A ΔE 0.065
- Prussian Blue #1D3557 ΔE 0.067
- Blueberry #464196 ΔE 0.071
- Cobalt #1E488F ΔE 0.074
- Marine #042E60 ΔE 0.078
- Dark Grey Blue #29465B ΔE 0.079
Use #3B3372 in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.